Offering a competitive advantage, Ankle Biters provide the added ankle support and protection needed for all race conditions.. Designed with a plastic cup sandwiched between the supportive neoprene and soft thermalweld padding for ankle protection with cushioning comfort. Works in any brand of cycling shoes with existing insoles; conforms to the arch of your shoes. Neoprene wraps around your ankle, closing with Velcro® for a secure fit. Can be easily trimmed for an exact, custom fit. Closeout.